OH and Cl radicals initiated oxidation of Amyl Acetate under atmospheric conditions: Kinetics, products and mechanisms

STRACCIA C, VIANNI C; BLANCO, MARÍA BELÉN; TERUEL, MARIANO ANDRES

Environmental Science: Atmospheres

RSC

Año: 2023

he relative rate coefficients of the gas-phase reaction of amyl acetate, (AA), CH₃COO(CH₂)₄CH₃with OH radicals and Cl atoms were determined at (298 ± 2) K and 1000 mbar of pressure. Theexperiments were developed in two different atmospheric Pyrex chambers coupled with “in situ”Fourier Transform Infrared (FTIR) spectroscopy and Gas Chromatography equipped with flameionization detection (GC-FID). The rate coefficients obtained from the average of differentexperiments were (in units of cm3.molecule-1.s-1): kAA + OH-FTIR = (6.00 ± 0.96)×10-12; kAA + OH-GC-FID =(6.37 ± 1.50)×10-12 and kAA + Cl-GC-FID = (1.35 ± 0.14)×10-10. Additionally, product studies werecompleted for the Cl –initiated oxidation of AA, in similar conditions of the kinetic experiments byGas Chromatography coupled with a mass detector (GC-MS) with Solid Phase Micro Extraction(SPME). Acetic acid, formaldehyde, acetaldehyde, propionaldehyde, and butyraldehyde were themain products identified. Compleme